摘要
以脱硫石膏和电石渣为主激发剂、硫酸钠和水泥熟料为辅助激发剂,与金川公司镍冶炼渣熔态还原提铁后产生的水淬二次镍渣制成胶凝材料,再按胶砂比为1∶4与棒磨砂制成质量分数为79%的胶结料,着重考察激发剂用量对胶结料强度的影响。结果表明,当胶凝材料中二次镍渣、脱硫石膏、电石渣、硫酸钠、水泥熟料的质量分数分别为85%、5%、5%、3%、2%时,胶结料的28 d抗压和抗折强度分别达到3.42 MPa和1.96 MPa,满足井下充填用胶结料的强度要求。XRD、SEM分析结果显示,在激发剂作用下,二次镍渣胶凝材料中的玻璃相和结晶态物质均可发生水化反应,水化产物主要为钙矾石和含Ca2+、Mg2+的硅(铝)酸盐凝胶。
The water-granulated secondary Ni slag produced by iron increase with the smelting reduction of Jinchuan nickel smelting slag is made into cemented materials with desulfurization gypsum and carbide slag as main activator and so- dium sulfate and cement clinker as auxiliary activator. Then together with milled sands at the cement-sand ratio of 1 ： 4, the cement materials with the mass fraction of 79% are produced so as to study the effects of activator＇s dosage on strength of cemented materials. The results show that when the mass fraction of the water-granulated secondary Ni slag, gypsum, calci- um carbide slag, sodium sulfate and cement clinker in the cemented materials are 85% , 5% , 5%, 3% and 2% separate- ly, the comprehensive strength and bending strength of the cement materials at 28 d reach 3.42 MPa and 1.96 MPa, which meet the strength requirements of the underground filling binder. It is observed by means of XRD and SEM that under the reaction of activator the glass phase and crystalline mass in the secondary nickel slag cementitious materials can occur the hydration reaction, and the main hydration products are ettringite and silicate （aluminate） gel containing Ca^2＋ and Mg^2＋.
出处
《金属矿山》
CAS
北大核心
2013年第4期159-163,共5页
Metal Mine
基金
"十一五"国家科技支撑计划项目(编号:2009BAB45B07)
关键词
水淬二次镍渣
激发剂
胶结料
抗压强度
抗折强度
Water-granulated secondary Ni slag, Activator, Cemented materials, Comprehensive strength, Bending strength
